Mac SE/30 with Upgraded ROM

This page describes a small set of patches to Mac OS System 7.5 or later. These patches are required when using System 7.5 – 8.1 on certain Macintosh models with an upgraded ROM, such as a Mac ROM-inator II or a borrowed IIsi or IIfx ROM SIMM. The information below was taken from Gamba’s Macintosh web page and is preserved here to help ensure it doesn’t disappear from the web.

Mac IIcx and IIcx Note: It was originally believed these patches were only necessary for the Mac SE/30, but we’ve since learned they’re also relevant to the Mac IIx and IIcx, and possibly others too. Gamba’s instructions below will direct you to find sections of the System file with this general form:

… 0007 0003 0008 0003 0009 0003 …

These are pairs of gestalt IDs followed by boot methods. The boot method is 0003 for each of the gestalt IDs 0007, 0008, and 0009. For System 7.5 or later to function correctly with an alternate ROM, you must find the gestalt ID for your Macintosh model, and change the corresponding boot method to 0005. The notes below are specific to the Mac SE/30, which has gestalt ID 0009. The other relevant IDs are:

0007 – Mac IIx
0008 – Mac IIcx
0009 – Mac SE/30

Thanks to Vintage Box : 68k Mac – OS 8/030 for the OS 8 & 8.1 hacks.

Description:

Following are methods for installing OS 7.0.1, 7.1, 7.5.3, 7.5.5, 7.6.1, 8.0, or 8.1 on an SE/30 with a IIsi or IIfx ROM SIMM.

With these ROM SIMMs Mode 32 is not required and should not be installed.
Minimum hardware requirements: 16 MB RAM, 44 MB free space on hard drive.

We have not encountered any problems with variations in SE/30 logic boards.

ROM SIMM information is included. Compatibility with boot disks has been tested.

Software links

OS 7.0.1 & 7.1 Install:

Both 7.0.1 and 7.1 work OK without hacks, with Installer option

‘Customize: System Software for any Macintosh’.

OS 7.5.3 Install:

Hard drive to have OS 7.0.1 or 7.1. Also 7.5.3 Installer, System Picker 1.1a3, ResEdit 2.1.3, and Mode32 v7.5 Installer.
Turn off SE/30 and install IIsi or IIfx ROM SIMM.
Boot from hard drive OS 7.0.1 or 7.1 and open Mode32 v7.5 Installer. Remove Mode 32 v7.5.
In Memory control panel set ’32-bit Addressing’ to ‘On’. Close Memory control panel and reboot.
Launch the 7.5.3 Installer with Installer options “Clean Install” (COMMAND SHIFT k) and “Easy Install”.

NOTE: “Clean Install” will save the original System software in ‘Previous System Folder’
After Installer is done, restart with 7.0.1 Disk Tools floppy and do:

ResEdit hack to ‘System 7.5 Update’ file in ‘System Folder’:

• ‘gusd’ resource ‘ID 1’ at offset ‘000018’, replace data ‘0008 0003 0009 0003‘ with data ‘0008 0003 0009 0005‘.

ResEdit hack to ‘System’ file in ‘System Folder’:

• ‘gusd’ resource ‘ID 1’ at offset ‘000018’, replace data ‘0008 0003 0009 0003‘ with data ‘0008 0003 0009 0005‘.
Use System Picker to select hard drive OS 7.5.3 for reboot.

OS 7.5.5 Update Install:

Hard drive to have OS 7.5.3, installed per above. Also 7.5.5 Update Installer, System Picker 1.1a3, ResEdit 2.1.3, and Disk Copy 6.3.3.
Boot from hard drive OS 7.5.3. Mount the OS 7.5.5 disk images on the desktop. Launch the 7.5.5 Update Installer.
After Installer is done, restart with 7.0.1 Disk Tools floppy and do.

ResEdit hack to ‘System’ file in ‘System Folder’:

• ‘gusd’ resource ‘ID 1’ at offset ‘000018’, replace data ‘0008 0003 0009 0003‘ with data ‘0008 0003 0009 0005‘.
Use System Picker to select hard drive OS 7.5.5 for reboot.

OS 7.6.1 Install:

NOTE: 7.6.1 Update will be installed on top of 7.6 without trying to boot from 7.6.
CD ROM drive or hard drive to have OS 7.6 installer.
Hard drive to have OS 7.0.1 or 7.1, 7.6.1 Update Installer, ResEdit 2.1.3, and Disk Copy 6.3.3.
Modify 7.0.1 Disk Tools floppy as follows:

• Trash Apple HD SC Setup.

• Add Wish I Were and CD-Sunrise v2.2c extensions to Extensions folder.

• Add Wish I Were control panel to Control Panels folder.

• Add System_Picker 1.1a3 application.
Turn off SE/30 and install IIsi or IIfx ROM SIMM.
Boot from modified 7.0.1 Disk Tools floppy, set Wish I Were control panel to ‘Macintosh IIsi’, close control panel, and reboot with modified 7.0.1 Disk Tools floppy.
Launch the 7.6 Installer with Installer options “Clean Install” and “Easy Install”.
After the 7.6 Installer is done Trash any mounted 7.6 Installer images from desktop.
Launch the 7.6.1 Update installer. After the 7.6.1 Update installer is done do:

ResEdit hack to 7.6.1 System file:

• ‘gusd’ resource ‘ID 1’ at offset ‘000018’ ,

replace data ‘0008 0003 0009 0003‘
with data ‘0008 0003 0009 0005‘.
Use System Picker to select hard drive OS 7.6.1 for reboot.

OS 8.0 Install:

Hard drive to have OS 7.0.1 or 7.1, System Picker 1.1a3, ResEdit 2.1.3, Wish I Were, Mode32 v7.5 Installer, and os8-030patch folder.
CD ROM drive to have OS 8.0 or OS 8.1 CD.
Turn off SE/30 and install IIsi or IIfx ROM SIMM.
Boot from hard drive OS 7.0.1 or 7.1 and open Mode32 v7.5 Installer. Remove Mode 32 v7.5.
In Memory control panel set ’32-bit Addressing’ to ‘On’. Close Memory control panel.
Drag Wish I Were control panel and Wish I Were extension to hard drive 7.0.1 or 7.1 System Folder icon.
Set Wish I Were control panel to ‘Quadra 700’, close control panel, then reboot.
On the Mac OS 8.1 CD, the OS 8.0 Installer is located at

Full Install Pieces–>Software Installers–>System Software–>Mac OS 8–>.
Launch the 8.0 Installer with Installer options “Clean Install” and “Easy Install”.
After Installer is done, restart with 7.0.1 Disk Tools floppy and do:

ResEdit hacks to 8.0 System file:

• Replace ‘boot’ resource ‘ID 2’ with the same resource from ‘os8-030patch.rsrc’.

• Replace ‘gbly’ resource ‘ID -16385’ with the same resource from ‘os8-030patch.rsrc’.

• ‘gusd’ resource ‘ID 1’ at offset ‘000010’, replace data ‘0016 0006’ with data ‘0009 0005’.
Trash the ‘Monitors and Sound’ control panel.
From the Apple Extras folder drag both the ‘Monitors’ and ‘Sound’ control panels to the System Folder icon.
Use System Picker to select hard drive OS 8.0 for reboot.
NOTE: System 7 will now be in ‘Previous System Folder’

OS 8.1 Update Install:

Hard drive to have OS 8.0, installed per above, and OS 8.1 Update installer, Disk Copy 6.3.3, System Picker 1.1a3, ResEdit 2.1.3, Wish I Were, and os8-030patch folder.
Boot from hard drive OS 8.0.
Drag Wish I Were control panel and Wish I Were extension to OS 8.0 System folder icon.
Set Extensions Manager to ‘My Settings’, check all boxes.
Set Wish I Were control panel to ‘Quadra 700’, close control panel, then reboot.
Open Mac OS 8.1 Update installer, in Options uncheck ‘Update Apple Hard Drive Drivers’.
Run Mac OS 8.1 Update installer.
After installer is done, restart with 7.0.1 Disk Tools floppy and do:

ResEdit hacks to 8.1 System file:

• Replace ‘gbly’ resource ‘ID -16385’ with the same resource from ‘os8-030patch.rsrc’.

• ‘gusd’ resource ‘ID 1’ at offset ‘000010’, replace data ‘0016 0006’ with data ‘0009 0006’.
Use System Picker to select hard drive OS 8.1 for reboot.

Boot Disk Compatibility:

OS 7.0.1 and 7.1 Disk Tools:

   Both worked OK with no hacks.

OS 7.5 Network Access Disk:

   Requires ResEdit hack to 7.5 System file:

     ‘gusd’ resource ‘ID 1’ at offset ‘000018’, replace data ‘0008 0003 0009 0003‘ with data ‘0008 0003 0009 0005‘.

OS 7.5.3 Disk Tools 1:

   We were unable to get this disk to work.

OS 8.0 Disk Tools 1:

   We were unable to get this disk to work.

Software Downloads: (OS 7.6 and OS 8.0 Installers not included.)

Mode32 v7.5 Installer..For removing Mode32 version 7.5.

OS 7.0.1…………….For running installers.

7.0.1 Disk Tools……For installing OS 7.5.3 and higher.

CD-Sunrise v2.2c……Universal CD-ROM driver extension.

Wish I Were 2.0…….Control Panel and Extension, for installing 7.6.1, 8.0, or 8.1.

System_Picker 1.1a3..For selecting the boot OS.

7.1

7.5.3 Installer

7.5.5 Update

7.6.1 Update

8.1 Update

OS8-030 Patch………For patching OS 8 & 8.1.

ResEdit 2.1.3……….For editing System files.

Disk Copy 6.3.3…….For mounting Installer Disk Images.

TattleTech 2.58………For identifying ROM SIMM.

Tech Info:

ROM Checksums.…..For identifying ROM SIMM.

List of Gestalt codes for Macintosh Computers…For installing 8.0 & 8.1 on other 68030 Macs.

Macintosh Computers: ROM Version Numbers.

Macintosh: ROM Size for Various Models.

ROM chip cross reference.

ROM SIMM Info

IIsi ROM SIMM

IC part numbers:

  341S0820

  341S0821

  341S0822

  341S0823

IC package: PLCC-32

ROM base: N27C010-120V10
ROM type: OTP EPROM (128K X 8)

Data: (using TattleTech 2.58)

  ROM Size = 524,288 Bytes

  ROM Version = $67C (124)

  + ROM is Universa l= No

  + ROM is 32 Bit Clean = Yes

  ROM Sub-Version = $12F1

  ROM CheckSum=$36B7FB6C

  ROM Start = $40800000

IIfx ROM SIMMs

IC part numbers:

  341S0769

  341S0770

  341S0771

  341S0772

IC package: PLCC-32

ROM base: M5M27C101JK

ROM type: EPROM (128K X 8)

IC part numbers:

  341S0781

  341S0782

  341S0783

  341S0784

IC package: SOIC-32

ROM base: HN62331

ROM type: Mask (128K X 8)

Data: (using TattleTech 2.58):

ROM Size = 524,288 Bytes

ROM Version = $67C (124)

+ ROM is Universal = Yes

+ ROM is 32 Bit Clean = Yes

ROM Sub-Version = $11F2

ROM CheckSum=$4147DD77

ROM Start = $40800000

SE/30 ROM SIMMs

IC part numbers:

  342S0654-A

  342S0653-A

  342S0652-A

  342S0651-A

IC package: PLCC-32

ROM base: 27C512

ROM type: OTP EPROM (64K X 8)

IC part numbers:

  HN62321AFR64

  HN62321AFR63

  HN62321AFR62

  HN62321AFR61

IC package: SOIC-32

ROM base: HN62321
ROM type: Mask (128K X 8)

IC part numbers:

  342S0642

  342S0641

  342S0640

  342S0639

IC package: PLCC-44

ROM base: VLSI VT23512

ROM type: Mask (???K X ?)

Data: (using TattleTech 2.58)

ROM Size = 262,144 Bytes

ROM Version = $178 (120)

+ ROM is Universal = No

+ ROM is 32 Bit Clean = No

ROM Sub-Version = $0

ROM CheckSum=$97221136

ROM Start = $40800000

IIci ROMs
IC part numbers: 341-0733 341-0734 341-0735 341-0736 IC package: DIP-32 ROM base: TC531001CP ROM type: Mask (128K X 8)
Data: (using TattleTech 2.58) ROM Size = 524,288 Bytes ROM Version = $67C (124) + ROM is Universa l= Yes + ROM is 32 Bit Clean = Yes ROM Sub-Version = $10F1 ROM CheckSum=$368CADFE ROM Start = $40800000

SE/30:  RAM: 20MB
Hard Drive: Quantum LPS270S (258 MB) (Apple ROM)


          Formatted with Apple HD SC Setup 7.3.5.

Logic Boards that worked: markings & IC part numbers
630 number 820 number Bar Code UK6 UG7 UG6 UE7 UE6 UE10 UH7	630-4198-11 820-0260-10 (1988) ; BK9047084 341-0650-A 341-0633-A 341-0635-A 341-0688-A 341-0637-A 344S0063-1 ????	(none marked) 820-0260-A (1989) BK0033675 341-0650-A 341-0746 341-0747 341-0755 341-0754 344S0063-A 341S0689C	(none marked) 820-0260-A (1989) sf23912R00YC ; 341-0650-A 341-0746 341-0747-A 341-0755 341-0754 344S0063-A ????

5 comments

5 Comments so far

David Bailey - October 14th, 2022 2:46 pm

I purchased the Rom-inator II and installed it in my SE/30 that was taking 4 minutes to get to the chime. I read that some change may need to be change but it is referring to system 7.5.3 and not 7.5.0 that I have. I have a copy of Resedit but I am not finding the specifics for making any modification necessary. Can you point me in the right direction? Booting with a system 7.1 disk shows the pirate and boots promptly. Also where might I find what to do to get it to boot from the ROM.

Thanks, David
Steve - October 14th, 2022 7:14 pm

I would recommend upgrading to 7.5.3 because 7.5.0 reportedly has some serious bugs. However, the instructions here for patching system 7.5.3 should also apply to 7.5.0. I emailed some additional info to you.
SteveP - November 28th, 2024 7:53 pm

A lot of the download links no longer work, any good alternative sources for the downloads?
Steve - December 1st, 2024 11:08 am

This page was archived from Gamba’s web site, who sadly passed away in 2003. The Apple FTP server that Gamba linked to is no longer online. Most or all of the Apple installers and other software that he mentioned should be available at Macintosh Garden. For the other tech info, you may need try the Internet Archive.
James Wages - December 5th, 2024 4:38 pm

SteveP, I am going to talk to Steve Crutchfield about expanding the functionality of his excellent ResPatch app to include OS 8.0 and 8.1, but in the meantime, a manual ResEdit hack to the System file is required. I couldn’t find the OS8 patch resource (“os8-030patch.rsrc”) on Macintosh Garden, and I’m not sure why the thing is so difficult to find. But at last I found it at MacGUI here: https://macgui.com/downloads/?file_id=20095